The blood on Dalton's chin changes repeatedly across shots.
When Mac was climbing up the wall using the metal pole that Jack and Samantha were pushing on, as he reached the top and moved to go over the railing the pole naturally got pushed outward causing it to fall away from the building as seen in the shot. But as the scene switched to when Mac got over the railing you can clearly see the pole resting on the corner of the wall that he climbed.
At around 1:34, the samba dance in street is from Helsinki, Finland - not Cuba as the voice over claims. The white church in the background is the Helsinki Cathedral. Havana, Cuba is quite a distance away from Helsinki, Finland: 8700 km or 5400 miles.