you're right, let's try instead in I3:

=INDEX(B2:B$51,MATCH("Restaurant",A2:A$51,0))&CHAR(10)&INDEX(B2:B$51,MATCH("Meal",A2:A$51,0))

copied down.

Note also, as I mentioned previously, in B13 of the summary you will need to change the $A$1 to $A$13

e.g.

=IF(COUNTIFS('Aquarius Data'!$I:$I,$A$13,'Aquarius Data'!$C:$C,$A15,'Aquarius Data'!D:D,"Y")=0,"",COUNTIFS('Aquarius Data'!$I:$I,$A$13,'Aquarius Data'!$C:$C,$A15,'Aquarius Data'!D:D,"Y"))
copied down and across.

The Char(10) is inserting the non-printable carriage return inputted in A1 of the Summary (it was inserted using ALT+ENTER.. which is Char(10))