fix item page index count

[ioeylim]

Note: if/when we add the "channels" tab – which allows you to see what other channels this item has been added to – I am of the belief that the index count / channel count should be either removed or displayed in a different place than it is currently ("Index [13/38]"). So just noting that if we decide to remove the "count" from the item page, this issue can be closed.