Yes, it looks like there is an issue when displaying all records that it won't show the "to" number.
It doesn't really make sense to show anyway since the two numbers will always be the same. You are displaying all records, so if the formula is:
Records X to Y of Z
X will always be 1 because you are showing all records there is no pagination... and Y will always be equal to Z because again all records are displayed.
It might make sense to just remove the beginning: "Records X to Y of" and just make it say "Z records found". Since in this case the third number is really the only significant one.
Anyway... I did fix your page to show the second number as the same as the third by using the same variable for both.