<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM N-SAR
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FORM N-SAR.
</LEGEND>
<RESTATED>
<CIK> 0000756922
<NAME> MULTI CLASS ADVANTUS MORTGAGE SECURITIES
<SERIES>
<NUMBER> 101
<NAME> CLASS B
<MULTIPLIER> 1000
<CURRENCY> US
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 49,128
<INVESTMENTS-AT-VALUE> 48,900
<RECEIVABLES> 650
<ASSETS-OTHER> 114
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<PAYABLE-FOR-SECURITIES> 0
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<OTHER-ITEMS-LIABILITIES> 155
<TOTAL-LIABILITIES> 155
<SENIOR-EQUITY> 48
<PAID-IN-CAPITAL-COMMON> 50,476
<SHARES-COMMON-STOCK> 1,390
<SHARES-COMMON-PRIOR> 1,361
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 147
<ACCUMULATED-NET-GAINS> (639)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (229)
<NET-ASSETS> 14,436
<DIVIDEND-INCOME> 36
<INTEREST-INCOME> 3,751
<OTHER-INCOME> 0
<EXPENSES-NET> 594
<NET-INVESTMENT-INCOME> 3,193
<REALIZED-GAINS-CURRENT> (105)
<APPREC-INCREASE-CURRENT> 396
<NET-CHANGE-FROM-OPS> 3,484
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 858
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 324
<NUMBER-OF-SHARES-REDEEMED> 363
<SHARES-REINVESTED> 68
<NET-CHANGE-IN-ASSETS> (3,289)
<ACCUMULATED-NII-PRIOR> 3,027
<ACCUMULATED-GAINS-PRIOR> (533)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 261
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 774
<AVERAGE-NET-ASSETS> 13,864
<PER-SHARE-NAV-BEGIN> 10.33
<PER-SHARE-NII> 0.61
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<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.39
<EXPENSE-RATIO> 1.70
</TABLE>
