That's what wmakes it strange I really do have them ... some aren't reported as missing and some are. All missing roms posted here are in fact in their respective directories ... I never had this kind of problem... I must be overlooking something.
Example:in the directory ddr3mp there are 5 files:
a22jaa02.chd
gca22ja.u1
gca22ja.u6
gea22ja.u1
gea22ja.u6
Three roms arent reported as missing and two are ...

Dance Dance Revolution 3rd Mix Plus (G*A22 VER. JAA) [system: System 573 BIOS - folder: ddr3mp - size: 517kb]
missing rom: gca22ja.u1 [size: 4116] [CRC32: 6291defc] [SHA1: bb9dad69896826aeb42dafa91cb99599467c31ff]
missing rom: gea22ja.u1 [size: 548] [CRC32: ef370ff7] [SHA1: cb7a043f8bfa535e54ae9af728031d1018ed0734]

Dance Dance Revolution 4th Mix (G*A33 VER. AAA) [system: System 573 BIOS - folder: ddr4m - size: 517kb]
missing rom: gca33aa.u1 [size: 4116] [CRC32: f6feb2bd] [SHA1: dfd5bd532338849289e2e4c155c0ca86e79b9ae5]
missing rom: gea33aa.u1 [size: 548] [CRC32: 7bd2a24f] [SHA1: 62c73a54c4ed7697cf81ddbf3d13d4b0ca827be5]

Dance Dance Revolution 4th Mix Solo (G*A33 VER. ABA) [system: System 573 BIOS - folder: ddr4ms - parent: ddr4m - size: 517kb]
missing rom: gca33ab.u1 [size: 4116] [CRC32: 312ac13f] [SHA1: 05d733edc03cfc5ea03db6c683f59ed6ff860b5a]
missing rom: gea33ab.u1 [size: 548] [CRC32: 32fb3d13] [SHA1: 3ca6c77438f96b13d2c05f13a10fcff89a1403a2]

Dance Dance Revolution 4th Mix Plus (G*A34 VER. JAA) [system: System 573 BIOS - folder: ddr4mp - size: 525kb]
missing rom: gca34ja.22h [size: 8192] [CRC32: 80575c1f] [SHA1: a0594ca0f75bc7d49b645e835e9fa48a73c3c9c7]
missing rom: gca34ja.u1 [size: 4116] [CRC32: e9b6ce56] [SHA1: f040fba2b2b446baa840026dcd10f9785f8cc0a3]
missing rom: gea34ja.u1 [size: 548] [CRC32: 10f1e9b8] [SHA1: 985bd26638964beebba5de4c7cda772b402d2e59]

Dance Dance Revolution 4th Mix Plus Solo (G*A34 VER. JAA) [system: System 573 BIOS - folder: ddr4mps - parent: ddr4mp - size: 525kb]
missing rom: gca34jb.22h [size: 8192] [CRC32: bc6c8bd7] [SHA1: 10ceec5c7bc5ca9fca88f3c083a7d97012982079]
missing rom: gca34jb.u1 [size: 4116] [CRC32: 0c717300] [SHA1: 00d21f39fe90494ffec2f8799767cc46a9cd2b00]
missing rom: gea34jb.u1 [size: 548] [CRC32: babf6fdb] [SHA1: a2ef6b855d42072f0d3c72c8de9aff1f867de3f7]

Dance Dance Revolution 5th Mix (G*A27 VER. JAA) [system: System 573 BIOS - folder: ddr5m - size: 516kb]
missing rom: gca27ja.u1 [size: 4116] [CRC32: ec526036] [SHA1: f47d94d19268fdfa3ae9d42db9f2e2f9be318f2b]

DDR Max - Dance Dance Revolution 6th Mix (G*B19 VER. JAA) [system: System 573 BIOS - folder: ddrmax - size: 516kb]
missing rom: gcb19ja.u1 [size: 4116] [CRC32: 2255626a] [SHA1: cb70c4b551265ffc6cc41f7bd2678696e8067060]

DDR Max 2 - Dance Dance Revolution 7th Mix (G*B20 VER. JAA) [system: System 573 BIOS - folder: ddrmax2 - size: 516kb]
missing rom: gcb20ja.u1 [size: 4116] [CRC32: fb7e0f58] [SHA1: e6da23257a2a2ba7c69e817a91a0a8864f009386]

Dance Dance Revolution Solo 2000 (GC905 VER. AAA) [system: System 573 BIOS - folder: ddrs2k - size: 512kb]
missing rom: gc905aa.u1 [size: 132] [CRC32: 21073a3e] [SHA1: afa12404ceb462b9016a41c40775da87aa09cfeb]
missing rom: ge905aa.u1 [size: 132] [CRC32: 36d18e2f] [SHA1: e976047dfbee62de9ad9e5de8e7629a24c29d581]

Dance Dance Revolution Solo 2000 (GC905 VER. JAA) [system: System 573 BIOS - folder: ddrs2kj - parent: ddrs2k - size: 512kb]
missing rom: gc905ja.u1 [size: 132] [CRC32: b7a104b0] [SHA1: 0f6901e41640f729f8a084a33148a9b900475594]
missing rom: ge905ja.u1 [size: 132] [CRC32: a077b0a1] [SHA1: 8f247b38c933a104a325ebf1f1691ef260480e1a]

Dance Dance Revolution Solo Bass Mix (GQ894 VER. JAA) [system: System 573 BIOS - folder: ddrsbm - size: 512kb]
missing rom: gq894ja.u1 [size: 132] [CRC32: cc3a47de] [SHA1: f6e2e101870370b1e295a4a9ed546aa2d8bc2010]

Dance Dance Revolution USA (G*A44 VER. UAA) [system: System 573 BIOS - folder: ddrusa - size: 516kb]
missing rom: gka44ua.u1 [size: 4116] [CRC32: 2ef7c4f1] [SHA1: 9004d27179ece86883d01b3e6bbfeebc1b478d57]

Dance Maniax 2nd Mix (G*A39 VER. JAA) [system: System 573 BIOS - folder: dmx2m - size: 516kb]
missing rom: gca39ja.u1 [size: 4116] [CRC32: ecc75eb7] [SHA1: af66ced28ba5e79ae32ae0ef12d2ebe4207f3822]

Dance Maniax 2nd Mix Append J-Paradise (G*A38 VER. JAA) [system: System 573 BIOS - folder: dmx2majp - size: 5mb]
missing rom: gca38ja.27m [size: 2097152] [CRC32: 6c3934b8] [SHA1: f0e4a692b6caaf60fefaec87fd23da577439f69d]
missing rom: gca38ja.31m [size: 2097152] [CRC32: a0f54ab5] [SHA1: a5ae67d7619393779c79a2e227cac0675eeef538]
missing rom: gca38ja.u1 [size: 4116] [CRC32: 99a746b8] [SHA1: 333236e59a707ecaf840a66f9b947ceade2cf2c9]

Dance Freaks (G*874 VER. KAA) [system: System 573 BIOS - folder: dncfrks - size: 516kb]
missing rom: gk874ka.u1 [size: 4116] [CRC32: 7a6f4672] [SHA1: 2e009e57760e92f48070a69cff5597c37a4783a2]

DrumMania 2nd Mix (GE912 VER. JAA) [system: System 573 BIOS - folder: drmn2m - size: 517kb]
missing rom: ge912ja.u1 [size: 548] [CRC32: 1246fe5b] [SHA1: b58d4f4c95e13abf639d645223565544bd79a58a]
missing rom: gn912ja.u1 [size: 4116] [CRC32: 34deea99] [SHA1: f179e22eaf30453bb94177ed9c25d7996f020c99]

Dancing Stage featuring TRUE KiSS DESTiNATiON (G*884 VER. JAA) [system: System 573 BIOS - folder: dsftkd - size: 512kb]
missing rom: gn884ja.u1 [size: 132] [CRC32: ce6b98ce] [SHA1: 75549d9470345ce06d2706d373b19416d97e5b9a]

Salary Man Champ (GCA18 VER. JAA) [system: System 573 BIOS - folder: salarymc - size: 512kb]
missing rom: gca18jaa.u1 [size: 132] [CRC32: c9197f67] [SHA1: 8e95a89008f756a79295f2cb557c39efca1351e7]