add missing word

Found-bugs-and-limitations-in-RCT2.md

@@ -5,12 +5,12 @@ Bugs introduced by OpenRCT2 should be reported under Issues.
 
 # Bugs
 * On long queue lines, guest will sometimes enter the queue path without joining the actual queue. Instead, they will walk to the entrance and then return.
-* Some rides are twice in the scenario editor selection list. Only of them can be selected, but when you go to the next step and them back, the selected rides counter at the bottom will count both of them.
+* Some rides are twice in the scenario editor selection list. Only one of them can be selected, but when you go to the next step and them back, the selected rides counter at the bottom will count both of them.
 * When you select a saved ride with certain scenery, such as swamp goo, and hover it over the map without actually placing, the 'ghost' of the goo (the construction marker) doesn't go away. It can even be sold, although it hasn't cost you anything. This allows you to make a lot of money in a short time. A video with an explanation is here: https://www.youtube.com/watch?v=MpSpAXuqRGo
 * Alleged [assembly bug](https://github.com/IntelOrca/OpenRCT2/pull/397).
 * Peep AI pathfinding bug resulting in large numbers of park guests becoming 'lost' and walking in very tight loops. Causes a rapid degradation in Park Rating.
 * Rides (.TD6 files) saved in the Rollercoaster Designer and in Scenarios are sometimes stored with the wrong heights and path clearances so they cannot be placed back in parks exactly as they were originally built.
-* Underflow error causing 999 park rating if you have enough angry peeps. 
+* Underflow error causing 999 park rating if you have enough angry peeps.
 * ~~Litter bin do not get full.~~ ([Fixed with 763](https://github.com/IntelOrca/OpenRCT2/pull/763))
 
 # Limitations