Regarding: Messages you can't *see*...

They are probably the ones in message tracking.
"Message Tracking" information doesn't "COUNT"
against your 200 Messages "limit"...

Only *STORED* "sent" and "InBox" messages *count*.

THIS is the "trick" >>>

Have you tried checking where it says "Show messages from: ____"

Go to that Drop Down Box and select "the beginning" -
it's the LAST choice ~

Do that for both SENT *and* InBox -
you'll find "Old & Forgotten" messages that are still In There!

/s/ Phred
..